For example, 110% of 230= 253 volts. Assuming L and PE are of the same size and material, indirect contact touch voltage is 126.5 volts. Would 0.33 seconds not appear more realistic?
From IEC 61200-413
ProMbrooke:
I am a bit confused by this. Why do the disconnection times in Table 41.1 appear to be based on a touch voltage of 100 volts rather than a touch voltage of 125 volts?
For example, 110% of 230= 253 volts. Assuming L and PE are of the same size and material, indirect contact touch voltage is 126.5 volts. Would 0.33 seconds not appear more realistic?
From IEC 61200-413
Table 41.1 refers to MAXIMUM disconnection times.
NOTE 1 says that disconnection is not required for protection against electric shock, but may be required for other reasons such as protection against thermal effects. Also, a 30mA R.C.D. usually protects against dangerous electric shocks in most cases, due to its swift operating action.
Z.
ProMbrooke:
I am a bit confused by this. Why do the disconnection times in Table 41.1 appear to be based on a touch voltage of 100 volts rather than a touch voltage of 125 volts?
For example, 110% of 230= 253 volts. Assuming L and PE are of the same size and material, indirect contact touch voltage is 126.5 volts. Would 0.33 seconds not appear more realistic?
From IEC 61200-413
Table 41.1 refers to MAXIMUM disconnection times.
NOTE 1 says that disconnection is not required for protection against electric shock, but may be required for other reasons such as protection against thermal effects. Also, a 30mA R.C.D. usually protects against dangerous electric shocks in most cases, due to its swift operating action.
Z.
